using System;

public class Program

{

    public static void Main(string[] args )

    {

        do 

        {

            Console.Write("x = ");

            string str = Console.ReadLine();

            if (str == "exit")

            {

                Console.WriteLine("Program has stopped");

                break;

            }

            else

            {

            int x = Convert.ToInt32(str);

            Console.WriteLine("y = ");

            int y = Convert.ToInt32(Console.ReadLine());

            int sum = x + y ;

            Console.WriteLine("Result: {0}", sum);

        }

    }

    while (true);

    }

}